Copying device



UNITED STATES PATENT OFFICE.

IVILLIAM E. A. INNES, OF PUEBLO, COLORADO.

COPYING DEVlCE.

SPECIFIGATION forming part of Letters Patent No. 448,346. dated March 1'7, 1891.

Application filed September 22, 1890. Serial No. 365 .812. (No model.)

To all witam it may conccrn:

Be it known that I, WILLIAM E. A. INNEs, of Pueblo, Pueblo county, Colorado, have invented certain new and useful Improvements in Copying Devices, of which the following is a full, clear, and exact description, reference being had to the accompanying drawngs, forming a part hereof.

My invention relates to an improvement in a copying device for copying letters, &c.; and it consists in the peculiar composition and construction hereinafter clescribed.

My object is to provide a simple, cheap, and effective copying device, and this result I obtain, as will be readily understood' from the following specification, taken in connection with the drawings, in which- Figure 1 represents a perspective view of the copying device, showing a part of the frame detached. Fg. 2 is a Vertical central cross-section of the same.

Similar letters refer to similar parts in both figures.

A represents the copying device consisting of the side and end bars B, which are mitered at their meeting edges O, and adapted to be secured together by screws D.

The bars B are each provided with the parallel grooves e, f, and g, forming continuous grooves, in which are secured the thin plates E, F, and G, leaving open chambers K and L between them.

I and J represent Vertical passages in' the opposite end or side bars of the frame, communicating with the chambers K and L between the plates E, F, and G.

To apply the copying composition II, the apparatus Ais then placed horizontally upon a table or other suitable place and the hot composition poured upon the plate E or G. IVhen the composition is cooled the apparatus is inverted and the outer side of the plate E or G filled in the same manner. This composition is composed of the proportionate ratios following: Dissolve two to three ounces of glue in as little water as possible; soften, but not dissolve, six ounces of pure French gelatine (rose color preferred) in water, and 'clrain as dry as possible; then put in a vessel and melt in a hot-water bath and apply glue; do not allow the bath to come to a boil until the glue and gelatine are entirely dissolved, after which boil for fifteen minutes; then add twenty-seven ounces of pure chemical glycerine and allow the whole composition to boil for one hour or more; strain into a vessel prepared to receive it; remove all blubbers, and when cool it will be ready for use..

IVhen' ready to apply the composition to the apparatus for copying, heat the composition and apply in the manner described to the outer sides of the plates E and G.

The object of having the central plate F is this: As the composition is easily` removed from the plate to which it may be applied by heating the same, and as this is to be avoided, the central plate F is used, situated at a suitable distance from the inner sides of the plates E and G, forming the chambers at either side of said plate F and allowing the free circulation of the air through said chambers by means of the opposite perforations I and J, communicating with said Chamber at each end, so that When the apparatus is inverted and the application of the composition to the outer side of the opposite plate is made the heat from the same enters the chamber adj oining and is driven thence through the perforations I and J at one end of the frame by the entrance of the cold air through the op' posite perforations, thus preventing the heat from the recently-applied composition to affect the other in an undesirable manner.

In operation the original copy is written with prepared aniline ink. It is then applied face down'to the surface of the composition. After being in this position from onehalf to one and a half minutes, remove the same, and copies may be taken as fast as paper can be placed on the composition, compressed, and removed. After as many copies as desired have been taken, lay aside without washing, and in twenty-four hours the device will be again ready for use. If at any time the surface seems to repel the paper, take a wet cloth and compress it as in taking a copy, remove the cloth, wring dry, apply again, and compress in manner described. Remove the same and the apparatus is again ready for use.

IIaving thus described my invention, what I claim as new, and desire to obtain by Letters Patent, is-

l. In a copying` device or apparatus, the

IOO

combination of the frame-Work provided Wi th continuous grooves 8, f, and g, as described, with the plates E, F, and G, of suitable material, engag'ing said gi'ooves, and a suitable copying composition upon the outer side of the two outer of the said plates, as and for the pui'pose set forth.

2. In a copying device 01' apparatus, the combination of the frame-work provided with the perforations I and` J at opposite cnds or sides, With plates E, F, and G, forming' botween them the ohainbers K and L, communicating With the perforations I and J at opposite ends 011 sides, snbstantially as and for the purpose set forth.

3. The combination, with two parallel plates having: a space between them, of afi'ame carrying the said plates, and a suitable copying' composition upon the outer sides of the said plates, as described.

4;. The combination, with two outer plates having a space between them, of an intermediate plate dividing the said Ispace, a frame carrying the said plates, and a suitable copy ing' composition upon the outer sides of the two ou'ter plates, as described.

In testiinony whereof I affix my signature in presence of two witnesses.

, IVILLIAM E. A. INNES.

VVtnesses:

A. C. FooTE, F. P. YEAGER. 

